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参数资料
| 型号： | SI4021-A1-FT |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 23/34页 |
| 文件大小： | 783K |
| 描述： | IC TX FSK 915MHZ 5.4V 16-TSSOP |
| 标准包装： | 96 |
| 频率： | 433MHz，868MHz，915MHz |
| 调制或协议： | FSK，OOK |
| 数据传输率 - 最大： | 512kbps |
| 功率 - 输出： | 8dBm |
| 电流 - 传输： | 24mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 电源电压： | 2.2 V ~ 5.4 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 管件 |
| 产品目录页面： | 585 (CN2011-ZH PDF) |
| 其它名称： | 336-1622-5 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页当前第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
Si4021
23
Push-button 1:
00000080
88 72 A6 10 C6 60 55 55 55 55 55 55 55 55 55 55
00000090
55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55
000000A0
55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55
000000B0
55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55
000000C0
55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55
000000D0
55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55
000000E0
55 55 55 55 55 55 C4 00 00 00 00 00 00 00 00 00
000000F0
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Short Explanation:
Address
Command
Parameter
Related Control Command
Remarks
8081
8
872
Configuration Control
433MHz band, Xtal C
L
=12pF
f
dev
=90kHz
8283
A
610
Frequency
f
c
=(43+1552/4000)*10MHz
8485
C6
60
Data Transmit
Transmit the next 96 bytes
86E5
60x55
Data
E6E7
C4
00
Sleep
Power down, go to address 80
Note:
This routine is repeatedly executed while PB1 is pressed, because continuous execution was selected at POR (CA1E code issued in
the power-on reset section before).
RX-TX ALIGNMENT PROCEDURES
RX-TX frequency offset can be caused only by the differences in the actual reference frequency. To minimize these errors it is suggested to
use the same crystal type and the same PCB layout for the crystal placement on the RX and TX PCBs.
To verify the possible RX-TX offset it is suggested to measure the CLK output of both chips with a high level of accuracy. Do not measure the
output at the XTL pin since the measurement process itself will change the reference frequency. Since the carrier frequencies are derived
from the reference frequency, having identical reference frequencies and nominal frequency settings at the TX and RX side there should be
no offset if the CLK signals have identical frequencies.
It is possible to monitor the actual RX-TX offset using the AFC status report included in the status byte of the receiver. By reading out the
status byte from the receiver the actual measured offset frequency will be reported. In order to get accurate values the AFC has to be
disabled during the read by clearing the "en" bit in the AFC Control Command (bit 0).
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